Wristband unit



FIG. 1 is a front top perspective view of a wristband unit, according to the design;

FIG. 2 is a rear bottom perspective view of the wristband unit, according to the design;

FIG. 3 is a rear elevational view of a wristband unit, according to the design;

FIG. 4 is a left side elevational view of a wristband unit, according to the design;

FIG. 5 is a front elevational view of a wristband unit, according to the design;

FIG. 6 is a right side elevational view of a wristband unit, according to the design;

FIG. 7 is a bottom plan view of a wristband unit, according to the design; and,

FIG. 8 is a top plan view of a wristband unit, according to the design.

The broken lines shown in the drawings depict portions of the wristband unit that form no part of the claimed design. 

CLAIM The ornamental design for a wristband unit, as shown and described. 